js/jq 键盘上下左右回车按键

js判断上下左右回车按键:

document.onkeydown=function(e){
  e=window.event||e;
  switch(e.keyCode){
    case 37: //左键
    console.log("left");
    break;
    case 38: //向上键
    console.log("top");
    break;
    case 39: //右键
    console.log("right");
    break;
    case 40: //向下键
    console.log("down");
    break;
    case 13: //回车键
    console.log("回车");
    default:
    break;
  }
}

 

jq上下左右按键移动:

var x = 0;//水平方向位移
var y = 0;//垂直方向位移
$(document).keydown(function (event) {
  case 37: y = y - 10; $("selector").css("left", y + "px"); break;
  case 38: x = x - 10; $("selector").css("top", x + "px"); break;
  case 39: y = y + 10; $("selector").css("left", y + "px"); break;
  case 40: x = x + 10; $("selector").css("top", x + "px"); break;
  default: break;
});

 

posted @ 2016-06-27 16:53  Redchar  阅读(3828)  评论(0编辑  收藏  举报